1969 Volume 22 Issue 8 Pages 364-368
Siomycin, a sulfur-containing peptide antibiotic, has been found to consist of one major (A) and two minor components (B and C). Siomycins A, B and C were isolated as single components from crude siomycin preparations and characterized in detail. Physicochemical properties of the three antibiotics are similar. Siomycin B is derived from siomycin A during storage, while siomycin C is a natural product of Streptomyces sioyaensis.